What is the theme of the book?

Dr. Hatch, in his attempts to recruit the members of the Electroclan to his twisted ways, employs the use of persuasive arguments, but these arguments pick and choose from the whole truth, making his position seem more relatable and morally justifiable than it, in fact, is. He presents a façade of openness but is actually keeping many secrets from them. The heroes themselves keep secrets from Hatch, such as the fact that Grace downloaded the mainframe of the Elgen computer, as well as the new powers Michael and Taylor develop.

The theme of openness also comes to light with the impact of Taylor's electric powers. She can read minds, so she forces openness, even on those who wish to keep secrets, such as the man the Voice sent to pick up the hard drive. The relationship between Michael and Taylor is an incredibly open one; there can be no secrets when your girlfriend can read your mind.